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Anatomy > Shoulder Muscles > Flashcards

Shoulder Muscles Flashcards

1
Q

deltoid origin

A

lateral one-third of the clavicle, acromion, the lower lip of the crest of the spine of the scapula

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2
Q

deltoid insertion

A

deltoid tuberosity of the humerus

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3
Q

deltoid action

A

abducts arm; medially & laterally rotate the arm

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4
Q

deltoid innervation

A

axillary nerve

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5
Q

deltoid artery

A

posterior circumflex humeral a.

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6
Q

Supraspinatus Origin

A

supraspinatous fossa

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7
Q

Supraspinatus Insertion

A

greater tubercle of the humerus (highest facet)

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8
Q

Supraspinatus Action

A

initiates abduction

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9
Q

Supraspinatus Inervation

A

suprascapular nerve

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10
Q

Supraspinatus Artery

A

suprascapular a.

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11
Q

Infraspinatus Origin

A

infraspinatous fossa

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12
Q

Infraspinatus Insertion

A

greater tubercle of the humerus (middle facet)

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13
Q

Infraspinatus Action

A

laterally rotates the arm

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14
Q

Infraspinatus Artery

A

suprascapular a.

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15
Q

Infraspinatus Innervation

A

suprascapular nerve.

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16
Q

Teres Minor Origin

A

upper 2/3 of the lateral border of the scapula

17
Q

Teres Minor Insertion

A

greater tubercle of the humerus (lowest facet)

18
Q

Teres Minor Action

A

laterally rotates the arm

19
Q

Teres Minor Artery

A

circumflex scapular a.

20
Q

Teres Minor Innervation

A

axillary nerve

21
Q

Teres Major Origin

A

dorsal surface of the inferior angle of the scapula

22
Q

Teres Major Insertion

A

crest of the lesser tubercle of the humerus

23
Q

Teres Major Action

A

adducts the arm, medially rotates the arm, assists in arm extension

24
Q

Teres Major Artery

A

circumflex scapular a.

25
Q

Teres Major Innervation

A

subscapular nerve

26
Q

Subscapularis Origin

A

medial two-thirds of the costal surface of the scapula (subscapular fossa)

27
Q

Subscapularis Insertion

A

lesser tubercle of the humerus

28
Q

Subscapularis Action

A

medially rotates the arm; assists extention of the arm

29
Q

Subscapularis Artery

A

subscapular a.

30
Q

Subscapularis Innervation

A

subscapular nerve

31
Q

Quadrangle Space

A

Superior border: inferior border of Teres Minor
Inferior Border: Superior border of Teres Major
Medial Border: Lateral border of Long Head
Lateral Border: Medial border of lateral head

32
Q

Axillary Nerves

A

Deltoid, Teres Minor

33
Q

Collateral Circulation

A

Axillary artery cross the scapula towards humerus and descend inferiorly. If blockage in axillary occurs in scapular region, the subscapular artery can circumvent the blocked area around border of scapula.

Anatomy (13 decks)

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